Git. Presenter: Haotao (Eric) Lai Contact:

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1 Git Presenter: Haotao (Eric) Lai Contact: 1

2 Acknowledge images with white background is from the following link: images with transparent background is from a book named Pro Git : images in the workflow section is from the atlassian git tutorial: 2

3 History from wiki 3

4 Setting up a repository git init, git clone, git config 4

5 Preparation I assume you already know how to install it. First time you use it, need to do some configuration job. config (in a Mac): /etc/gitconfig, --system ~/.gitconfig, --global specific_git_repo/.git/config $ git config --global user.name Eric Lai" $ git config --global user. haotao.lai@gmail.com 5

Get / Create a Git Repository get a repo from a remote server like GitHub or Bitbucket you need to use git clone [remote-url] [local-path] command create a local

6 Get / Create a Git Repository get a repo from a remote server like GitHub or Bitbucket you need to use git clone [remote-url] [local-path] command create a local Git repo you need to use git init command in the working directory you can find a directory in any Git repo named.git/, that s the place all the magic happened 6

7 Saving changes git add, git commit, git stash,.gitignore 7

8 File Status Lifecycle 8

9 Three Areas 7

10 Git Stage Area add file into stage area use git add file_name command 10

11 Remove File remove file from working directory use git rm file_name command remove file only from version control system (don t trace them anymore) use git rm --cached file_name command 11

12 Check Difference 12

13 Take a Snapshot (1) save a version of your work use git commit command git commit m commit message (put commit message in a line) git commit (vim will be opened to ask you input commit message) every time you commit a version, you have a chance to come back 13

14 Take a Snapshot (2) image from: 14

15 Temporary save your work Need to jump to other emergency work immediately, but haven t finish your current work use git stash command Get my work back use git stash pop or git stash apply But, by default Git will NOT stash the untracked files or ignore files. 15

16 Inspecting a repository git status, git log 16

17 Undo changes git checkout, git revert, git reset, git clean 17

18 Checkout git checkout <commit> git checkout <commit> <file> git checkout <branch> checkout file from history or stage area switch between branch 18

19 Revert vs. Reset revert: using a new commit to undo the previous commit git revert <commit> reset: when you undo with git reset(and the commits are no longer referenced by any ref or the reflog), there is no way to retrieve the original copy it is a permanent undo. git reset <commit> 19

20 Clean The git clean command removes untracked files (DANGEROUS!!!) from your working directory. 20

21 Collaborating 21

22 Remote Repository (1) git remote add <remote_repo_name> <URL> git remote -v git remote rm <remote_repo_name> git remote rename <old_name> <new_name> 22

Remote Repository (2) git push [remote_repo_name] [branch_name] push your local data to the remote repo something different when you first push, follows the tips

23 Remote Repository (2) git push [remote_repo_name] [branch_name] push your local data to the remote repo something different when you first push, follows the tips provided by Git git pull something like git fetch && git merge git fetch [remote_repo_name] get all data from the remote repo will NOT do any merge for you (unlike git pull) 23

Tag (1) when you have an important version of data (like a release version), you would like to give a tag for that version, so that you can find it easily with using the SHA number git

24 Tag (1) when you have an important version of data (like a release version), you would like to give a tag for that version, so that you can find it easily with using the SHA number git tag (list all tags) git tag -a v1.4 -m 'my version 1.4 (an annotated tag example) git tag <tag_name> (a lightweight version tag) git tag -a v1.2 9fceb02 (add a tag to a previous commit) 24

25 Tag (2) tag will NOT be pushed to remote repo git push <remote_repo_name> <tag_name> (push a tag) git push <remote_repo_name> --tag (push all tags) you can t move the HEAD between tags, if you want to switch back to a tag, you can create a branch to hold the data in that tag git checkout -b [branch_name] [tag_name] be careful if you want to change the content of that tag 25

26 Branch --- that s what make Git powerful list all branches: git branch create a new branch: git branch <branch_name> create and switch that branch git checkout -b <branch_name> switch between two existed branches: git checkout <branch_name> merge a target branch into current branch: git merge <target_branch_name> 26

27 Branch Management list all merged branch (usually they can be deleted) git branch --merged (same story with --no-merged) git branch -d <branch_name> (only work for merged branch) delete anyway (force delete) git branch -D <branch_name> 27

28 Branch: merge, rebase merge rebase images from a book: Git Pro 28

29 Branch Warning do NOT rebase any thing already in the remote repo only can apply rebase command to your local data 29

30 WorkFlow Centralized Workflow, Feature Branch Workflow, Gitflow Workflow, Forking Workflow 30

31 Centralized Workflow 31

32 Feature Branch Workflow 32

33 Gitflow Workflow 33

34 Forking Workflow 34

35 Resources A well maintained list of resources related to Git on GitHub, check it through the following link: 35

GIT Princípy tvorby softvéru, FMFI UK Jana Kostičová,

GIT Princípy tvorby softvéru, FMFI UK Jana Kostičová, 25.4.2016 Basic features Distributed version control Developed in 2005, originally for Linux kernel development Free, GNU General Public License version